Question

Which number will replace the question mark (?) in the following number series? 5, 17, 53, ?, 485

• A. 163
• B. 157
• C. 159
• D. 161

Answer 1

Answer:

D. 161

5 × 3 + 2 = 17 17 × 3 + 2 = 53 So, 53 × 3 + 2 = 161